QRN sur Bretzelburg

In QRN over Bretzelburg, trouble stems from Fantasio's amazingly small transistor radio which gets wedged stuck inside the Marsupilami's nose. Apart from the grief and restlessness caused to all nearby by the unstoppable radio, the device jams the transmissions received by Marcelin Switch, a neighbour and radio enthusiast, who claims that this puts the life of King Ladislas of Bretzelburg in grave danger. While Spirou and Switch take Marsupilami to the clinic for nose surgery, Fantasio wearing a bathrobe and slippers in the wrong place at the wrong time is abducted by secret Bretzelpolizei who mistake him for Switch. Leaving the Marsupilami to recover in the hospital, Spirou, Spip and the nervous Switch travel to the dictatorial state of Bretzelburg, determined to rescue Fantasio, currently being tortured by the enthusiastic Dr.Kilkil. There, the team, reunited with the Marsupilami who has recovered uncannily fast and followed them across Europe, deal with a very unusual political situation...

Franquin has explained that he started QRN intending it to be another Zorglub story, but that this was vetoed by publisher Dupuis, who had seen enough of the character for the moment. Lost for ideas, Franquin called Greg to help come up with a new plot. Even with this help, Franquin was forced by an early bout of depression to abandon the story half-way through and return to it later. Franquin realised at that time that he would not carry on with Spirou et Fantasio for much longer.

In established comic book tradition, this album features apparently identical twin policemen similar to Thomson and Thompson from The Adventures of Tintin, this time in a stereotypically German incarnation. In one scene, the angry King tells them to take their hats off in his presence, assuring them that they run no risk of brain colds.

When first published in Spirou magazine, the story was named QRM sur Bretzelburg. The title was changed from "QRM" to "QRN" between the serialisation and the book publication. In Q code used by radio services, QRN refers to interference due to atmospheric noise while QRM refers to interference originating from electrical devices.

The magazine also featured scenes which were edited out for the book edition:

• In the opening, Spirou runs around the house desperately switching off Fantasio's loud-playing radios. He even goes so far as mistaking the air conditioner, the toaster and the flash camera for radios.^[1]
• The Marsupilami causes chaos when he wanders around town with the miniature radio jammed in his nose. A commentary on a football game matches his moves as he gets around the various people in his way, faces a policeman (goalkeeper in the commentary) and a goal is struck when the pursuing Spirou and Fantasio collide with the officer.^[2]
• Later, in Bretzelburg, Kilikil forces Fantasio to walk around the jail's exercise yard with shoes that are far too small for him.^[3] (This takes place after the scene where Fantasio is shown banging on the cell door and complaining about having no shoes; the shoes can be seen when he is moved to another cell next to the kitchen.)